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zloy xaker [14]
3 years ago
5

Please help ASAP What is the value of x? Enter your answer in the box.

Mathematics
2 answers:
Iteru [2.4K]3 years ago
8 0

Answer:

x=27

Step-by-step explanation:

We have been given a diagram of 2 triangles and we are asked to find the value of x.

We can see that triangle CDQ and RDB share a common angle and line CQ is parallel to line RB.

Since the corresponding angles formed by two parallel lines are equal, therefore,

m\angle DQC=m\angle DBR

m\angle DCQ=m\angle DRB

As all the angles is both triangles are equal, therefore, \Delta CDQ\sim\Delta RDB.

As both triangles are similar, so their corresponding sides will be proportional.

We can set a proportion for the sides of our given triangles as:

\frac{x}{18}=\frac{39}{26}

\frac{x}{18}*18=\frac{39}{26}*18

x=\frac{3}{2}*18

x=3*9

x=27

Therefore, the value of x is 27.

guapka [62]3 years ago
4 0

Just took the test and got the the correct answer *\(♡°▽°♡)/*

Look at the image down below!!

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Darina [25.2K]

Answer:

90

Step-by-step explanation:

\frac{5}{9}(194-32)=90

5 0
3 years ago
What is the sloe and y intercept for tge graph of y-3x=15
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8 0
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0.038 x 10 with a power of negative 2
Ghella [55]
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The easiest way to solve is if the exponent is positive you move the decimal to the right and if the exponent is negative the decimal moves to the left.

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With this diagram, what could be the values of c and d?
Sedaia [141]

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Step-by-step explanation:

7 0
2 years ago
The chemistry class was making 300 gallons of 30% isopropyl alcohol. They mixed 12% with 42%. How much of each did they use?
alexgriva [62]

Answer:

<u>The chemistry class mixed 120 gallons of 12% isopropyl alcohol and 180 gallons of 42% isopropyl alcohol.</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Amount of isopropyl alcohol made by the chemistry class = 300 of 30%

Amount of 12% isopropyl alcohol mixed by the chemistry class = x

Amount of 42% isopropyl alcohol mixed by the chemistry class = 300 - x

2. How much of each did they use?

Let's write our equation to solve for x, this way:

30% = 0.3, 12% = 0.12, 42% = 0.42

0.12x + 0.42 (300 - x) = 0.3 * 300

0.12x + 126 - 0.42x = 90

-0.3x = 90 - 126

-0.3x = -36

x = -36/-0.3

<u>x = 120 ⇒ 300 - x = 180</u>

<u>Let's prove x = 120 is correct</u>

0.12x + 0.42 (300 - x) = 0.3 * 300

0.12 * 120 + 0.42 (300 - 120) = 0.3 * 300

14.4 + 75.6 = 90

90 = 90

<u>We proved x = 120 is correct</u>

5 0
3 years ago
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